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Q. What is compound?
A compound is a substance which consists of two or more elements chemically combined. The elements in a compound aren't simply mingled together as they are in a mixture. In its place they are combined in a way such that the compound has properties that are different from those of the elements of which it is composed. Every compound is represented by a formula a combination of the symbols of the elements that make up the compounds. You may already recognize some chemical formulas such as H2O for water, NaCl for table salt and NH3 for ammonia.
Write a feature which will distinguish a metallic solid from an ionic solid. a) Explain 'order of a reaction'. b) What is an emulsion?
principle and application
The abstraction of a hydrogen atom The H-CN bond is stronger than the O-H bond, the abstraction of a hydrogen atom from HCN by the tert-butoxy radical is endothermic by 528 - 4
Mention the major reason for the anomalous behaviour of lithium in Group of the periodic table. Why is the third ionization energy of manganese (At. No. =25) unexpectedly high?
If the velocity of hydrogen molecule is 5x 10 4 cm sec -1 then its de-Broglie wavelength is: (1) 2 Å (2) 4 Å (3) 8 Å (4)100 Å Ans: 4 Å
Distinguish between acetaldehyde and ketone
why pcl3 is less polar than sicl4
eperiment on conductometric titration on acids and bases
Functions of nucleic acid: Nucleic acid has two major functions (a) Replication and (b) Protein synthesis.
maximum 200 problems
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